Phoenix Contact 1144175, User Manual, Page: 16 / 40

FL SWITCH EP74…
16/40
PHOENIX CONTACT 4083_en_A
4.3 Electrical/mechanical hazards prevention
DANGER: Electrocution hazard
Always disconnect the power at the supply source before connecting or disconnect-
ing wires to the terminal block. The cover must be installed over the terminal block be-
fore applying power.
If redundant power supplies are used, ensure that both power supply sources are dis-
connected.
CAUTION:
This equipment is intended only for use in a restricted access area.
Access to the battery located inside the unit is prohibited.
Access to wiring terminals and replaceable modules is restricted to skilled persons
only.
For improved convectional cooling and airflow, make sure that there is at least one rack unit
(44 mm) of space exists between devices on the rack.
Forced airflow is not required. However, any increase in airflow will result in a reduction of
ambient temperature and improve the long-term reliability of the equipment mounted in the
rack space.
When installing the device in a closed or multi-device rack, be aware that the ambient tem-
perature of the rack may be higher than the ambient temperature of the room. Make sure the
rack is installed in a suitable environment that can withstand the maximum ambient tem-
perature generated by the rack.
Do not exceed the maximum number of devices or weight restriction specified by the rack
manufacturer.
Do not overload the supply circuit. Refer to the overcurrent protection and power supply rat-
ings specified by the rack manufacturer.
Make sure the rack and all devices have a proper ground-to-Earth connection. Pay particu-
lar attention to power supply connections other than direct connections to the branch circuit
(e.g. power strips). Ensure that the rack mount adapters are installed on the correct side of
the chassis.
Do not store the switch in locations where it will be subject excessive dirt and dust and high
humidity. Conformal coating is recommended for humid/moist applications.